Stuck On Color Scheme

I am making a baby shower for next weekend and was hoping to get some color ideas from the invite....and it came white with silver writing. So not inspiring!

The woman having the baby is having a girl and is super excited about it because she already has a boy. I wanted to do a really girly cake. She is not traditional and they've named the baby already so I came up with this design. I love the design and think it will come out really nice...if I can come up with the right color scheme!

The cake will be all covered in fondant. I have the ability to airbrush. The scribbly stuff you see at the bottom will be ruffles. I want to do either a graduated color on those or multi color. What colors should I use? Help me color my cake!!

I would say if the invites were simple and elegant than perhaps that is her "style", so why not do a white cake with baby pink and silver accents... perhaps the bow be baby pink with the "ends" silver (either fade from pink to silver or just a silver end stripe)Same thing with the bottom... just do white, silver and baby pink... it will remain elegant and simple but still have a "pop" factor because of the pink and silver...

I've decided to go with pink and green. The cake will end up being a really light pink. I decided to change the design a bit. I made a baby topper. And a big, dark pink bow on the center. I haven't decided if I'll go with the ruffles yet. But the border around the cake is a minty green.